NCP1239 데이터 시트보기 (PDF) - ON Semiconductor
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NCP1239 Datasheet PDF : 26 Pages
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NCP1239
Table 4. ELECTRICAL CHARACTERISTICS (continued)
(For typical values TJ = 25°C, for min/max Values TJ = −40°C to +125°C, VHV = 125 V, VCC = 11 V unless otherwise noted)
Parameter
Test Conditions
Symbol
Min
Typ
Max Unit
CURRENT COMPARATOR
Internal Soft-Start Duration
Activated upon startup or
auto−recovery
A, B, C, D, E, G, H versions
F and I versions
tSS
ms
−
8
−
−
4
−
INTERNAL OSCILLATOR
Oscillation Frequency
(65-kHz Version)
fOSC
60
65
70
kHz
Oscillation Frequency
(100-kHz Version)
fOSC
92
100
108
kHz
Maximum Duty-Cycle
Frequency Jittering
In Percentage of fOSC – Jitter is
Kept even in Foldback Mode
DMAX
fJITTER
76
80
84
%
−
±5
−
%
Swing Frequency
FEEDBACK SECTION
fSWING
−
240
−
Hz
Equivalent AC Resistor from FB to GND
Internal Pull-Up Voltage on FB Pin
VFB to Current Setpoint Division Ratio
Feedback Voltage below which the Peak
Current is Frozen
(Note 1)
FB open
REQ
−
25
−
kW
VFB(ref)
4.1
4.3
−
V
KFB
−
4
−
VFREEZE
−
1.0
−
V
FREQUENCY FOLDBACK
Frequency Foldback Level on FB Pin
≈ 59% of Maximum Peak
Current
VFOLD
−
1.90
−
V
Transition Frequency below which Skip-Cycle VFB = VSKIP + 0.5 V
Occurs
fTRANS
22
26
30
kHz
End of Frequency Foldback Feedback Level
Skip-Cycle Level Voltage on FB Pin
Hysteresis on the Skip Comparator
INTERNAL RAMP COMPENSATION
fSW = fMIN
(Note 1)
VFOLD(end)
−
1.50
−
V
VSKIP
−
0.80
−
V
VSKIP(hyst)
−
30
−
mV
Compensation Ramp Slope
OVERPOWER COMPENSATION (OPP)
FSW = 65 kHz, RUP = 30 kW
FSW = 100 kHz, RUP = 30 kW
S65
S100
−
−29
− mV/ms
−
−45
−
VHV to IOPP Conversion Ratio
Current Flowing Out of CS Pin
(Note 2)
Percentage of Applied OPP Current
Percentage of Applied OPP Current
Clamped OPP Current
Watchdog Timer for DC Operation
BROWN-OUT (BO)
VHV = 125 V
VHV = 162 V
VHV = 328 V
VHV = 365 V
VFB < VFOLD
VFB > VFOLD + 0.7 V (VOPP)
VHV > 365 V
KOPP
IOPP(125)
IOPP(162)
IOPP(328)
IOPP(365)
IOPP1
IOPP2
IOPP3
tWD(OPP)
−
0.54
−
mA/V
−
0
−
mA
−
20
−
−
110
−
105
130
150
−
0
−
%
−
100
−
%
105
130
150
mA
−
32
−
ms
Brown-Out Thresholds (A, B, C & E versions) VHV Increasing
VBO(on)
100
110
120
V
Brown-Out Thresholds (A, B, C & E versions) VHV Decreasing
VBO(off)
93
101
109
V
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
1. Guaranteed by design
2. CS pin source current is a sum of IBIAS and IOPP, thus at VHV = 125 V is observed the IBIAS only, because IOPC is switched off.
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